Inductive power transfer apparatus

Patent metadata

Field	Value
Publication number	US-2016028240-A1
Application number	US-201514700770-A
Country	US
Kind code	A1
Filing date	Apr 30, 2015
Priority date	Oct 17, 2011
Publication date	Jan 28, 2016
Grant date	—

Abstract

A magnetic flux pad for receiving or generating magnetic flux. The pad includes two pole areas ( 11, 12 ) associated with a magnetically permeable core 14. Coils 17 define the pole areas. The pad allows useable flux to be generated at a significant height above a surface of the pad.

First claim

1 . A magnetic flux pad having a front face and a back face for generating or receiving magnetic flux in or from a space beyond the front face, the pad comprising:
two pole areas for sending or receiving flux, a magnetically permeable core, two coils magnetically associated with the core, whereby the flux enters the pad at one of the pole areas and exits the pad at the other pole area.

2 . A magnetic flux pad as claimed in claim 1 wherein the coils are flat coils.

3 . A magnetic flux pad as claimed in claim 1 wherein each coil defines one of the pole areas.

4 . A magnetic flux pad as claimed in claim 1 wherein the coils are spiral wound coils.

5 . A magnetic flux pad as claimed in claim 1 wherein the coils are located on a side of the core nearest to the front face of the pad.

6 . A magnetic flux pad as claimed in claim 1 wherein the coils and the core together form a flux path in the pad,

7 . A magnetic flux pad as claimed in claim 1 wherein the core comprises lengths of permeable material.

8 . A magnetic flux pad as claimed in claim 7 wherein the permeable material comprises ferrite.

9 . A magnetic flux pad as claimed in claim 1 wherein the coils are each asymmetric, the combination of windings of a coil being wider between the pole areas than at a periphery of the pad.

10 . A magnetic flux pad as claimed in claim 1 wherein the coils are located immediately adjacent to each other in the region between the pole areas.

11 . A magnetic flux pad as claimed in claim 1 wherein the coils are shaped to provide the poles areas and a flux pipe between the pole areas.

12 . A magnetic flux pad having a front face and back face for generating a magnetic flux in a space beyond the front face of the pad, the pad comprising:
two pole areas for sending or receiving flux, a magnetically permeable core, two coils associated with the core and being provided on a side of the core adjacent to the front face of the pad, whereby the pad produces an arch shaped flux in the space such that essentially each line flux starts on one of the pole areas, arches to the second pole area and joins on itself through the core with essentially no flux present at the back face of the pad.

13 . A magnetic flux pad having a front face and back face for receiving a magnetic flux from a space beyond the front face of the pad, the pad comprising:
two pole areas for sending or receiving flux, a magnetically permeable core, two coils associated with the core and being provided on a side of the core adjacent to the front face of the pad and adapted to receive a horizontal flux component, and a further coil magnetically associated with the core and adapted to receive a vertical flux component.

14 . An IPT system including a magnetic flux pad according to claim 1 .

15 - 19 . (canceled)

Assignees

• Boys John Talbot
• Covic Grant Anthony
• Huang Chang-Yu
• Budhia Mickel Bipin
• Auckland Uniservices Ltd

Inventors

• Boys John Talbot
• Covic Grant Anthony
• Huang Chang-Yu
• Budhia Mickel Bipin

Classifications

• H02J50/005

  Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices · CPC title

• B60L53/126

  Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver · CPC title

• Y02T90/12

  Electric charging stations · CPC title

• H02J50/70

  involving the reduction of electric, magnetic or electromagnetic leakage fields · CPC title

• H01F27/2871

  Pancake coils · CPC title